And then there's the process. There's no single polling day in PNG, and a final result won't be known until late July.

So here's your guide to PNG's five-yearly elections.

SO WHY DOES VOTING TAKE (AT LEAST) TWO WEEKS?

Simply put, PNG is one of the most infrastructure-poor nations on earth, and it's a country with some of the toughest natural geographical conditions on the planet. We're talking mountains, valleys and jungles.

PNG, which ranks at 154th place on the UN Human Development index, is home to 8 million people, the vast majority of whom live a subsistence lifestyle in remote villages.

Some are isolated, while some are connected to large towns or cities by cracked, pot-hole ridden roads or bush tracks.

Polling officials often have to fly or even float ballot boxes across unfriendly terrain.

Opposition candidates have accused the Government of interfering with the electoral roll, forcing some provinces -- as well as the capital city Port Moresby -- to briefly postpone voting amid logistical failures last week.

Australia for its part is helping with election logistics, with PNG's The National newspaper reporting Australia helped train the more than 30,000 elections workers, as well as lending planes and helicopters to help deliver more than 100,000 pounds of election materials to regional hubs.

WHO IS GOING TO BE PNG'S NEXT PM?

O'Neill -- a former treasurer and opposition leader -- has been in power since August 2011, when he was elected to the top job by parliament after it dumped former Prime Minister Sir Michael Somare following a vote.

That sparked a constitutional crisis -- which briefly left the country with with two prime ministers, two governors-general and two police chiefs. O'Neill came out on top, winning the Prime Ministership again after the 2012 election.

But predicting the outcome of the notoriously volatile PNG election can be a tough task.

With 44 political parties, MPs usually form coalition governments which have historically been unstable and shaky. O'Neill's PNC has had a large numerical advantage since the 2012 election, but these numbers have been in flux over the years.

Correspondents in Port Moresby will be keeping a keen eye on politicians' whereabouts following the vote count, with "camps" forming to give an indication of who might come out on top.

AFP/Getty Images
Tari wigman Nelson Yote (R) from Arou village checks his facial paint in a mirror fragment before performing at Papua New Guinea's Parliament House in Port Moresby, to welcome the newly elected members of government in 2007

Troubles mounted in Port Moresby last year, when police opened fire on students at the University of PNG who were marching against O'Neill. It sparked a vote of no confidence which O'Neill easily won.

This year, O'Neill's most prominent opposition is in the form of Don Polye, a former treasurer in O'Neill's government. Polye has dogged his former boss over financial and corruption issues since he became opposition leader in 2014.